Combined trip and throttle valve



June 22 1926.

C. E. SPINNLER COMBINED TRIP AND THROTTLE VALVE Filed Feb. 14 2 Shewecs-SheelJ 1 v|v IIIII m ma 2 Sheets-Sheet 2 Mfzw His Attorney.

C. E. SPINNLER COMBIN'ED`TRIP AND THROTTLE VALVE Filed Feb. 14 1923 June v22 '1926.

Inventor Charlas E. Sprmlef,

Patented 22, 192.6. y, y l UNITED STATES ,PA'rEN'l- OFFICE.

cHAaLEs E. srINNLEa, or scHENEcrAJJY, NEW oax, AssIGNoE, To GENERAL ELEG- Y Tmc COMPANY, A coNroE'ArIoN or NEW Yoan.

TRIP AND THBOTTLE VALVE.

lApplication led February 14, 1923. Serial No. 619,040.

The present invention relates to valves .which have the combinedA function of throttle and emergency valve and which are pri,-

` -niarily adapted to control the admission of ,steam or other operating -4iuidA to` prime' whereby the valve, to which it may be connected, may be opened and closed under ordinary conditions in the usual manner to regulate and controlthe fluid flow or may be closed suddenly from any open position under emergency conditions or whenever desirable or necessary by tripping the mechanism either manually or by any other desirable means to cut ofi' the fluid iow.

The object of the invention is to provide in fzoniunction with a throttle `valve an improved vmechanism f the type and for the l purpose described which issimple, compact and rugged in structure and positlve in action under all conditions.

In the accompanying drawings, Fig. 1 il-A lustrates in section one embodiment of my mventionvwith the valve ,mechanism set 1n A'-the full open position; Fig. 2 is a detail showing a. reduced size top view of the trip- I e ping mechanism of Fig. 15; Fig. 3 illustrates in section another embodiment of my invention wherein the valve mechanism 1s shown 1n the closed position after normal closing, and

, Fig. 4 is a detail showing a, reduced size top view of the .tripping mechanism 'of Fig. 3. Referring n ow particularly to Fig. 1, 5 is an ordinary flanged valve casing, the inte-f rior of which is divided by a diaphragm 6` into high and lowv pressure chambers. accord- -ing to theusual practice with a main valve 7 controlling the opening betweenl them. This valve is provided with a' dash Bot 8 to cushion the closing action and a y pass valve 9 to make for easy opening of the main -valva Both the main-valve 7 and the by- .pass valve 9 are operated by'ay valve rod 10 `which passes through a stuiling box 11 downwar 1y to the valve mechanism below.l The arrows indicate the; direction 'of fluid' flow iuid prime-movers and is here used only for purposes of illustration as'being typical of.

a valve to which directed.

Such a valve is characterized by a reciprocating valve operating rod as distinguished from one operated directly by the my invention is particularly usual screw threaded rod and is further characterized bythe fact that it is contin` ally urged toward the closed position by a force suicient to closev it whenreleased by the mechanism holding it open. In the valve here 'shown`this closing force is supplied by the fluid pressure acting on the valve itself,l the high pressure side of which is of larger area than the 10W pressure side, and when the valve is munted as shown with the valve operating rod extending downwardly, the weight of the yparts supplements this force.

It is not necessary thatthe valve, with.v which my invention may be used, have a bypass valve as part of the main valve as shown, although this is a desirable feature',- nor is it necessary that the valve be of such structure that the weight of its parts or the fluid pressure provide the constantly acting,- force which tends to blose it, as this 'force' may besupplied by other means, as, forexample, by a spring incorporated in the valve structure orembodied in the `valves mechanism itself. p y

In vview of the fact that the specific struc'- ture of thevalve is not `part of the invention and its construction and operation is known and well. understood, further description is believed to be unnecessary.

Integral with and joined and spaced byv the anged stuing box 11, which 1s rigidly bolted to the valve casing are two flat frame plates 12, one of whic tionalv ligure while both are shown in Fig. 2'.

appears in this sec- These frameplatesextend downwardly par-,

integral by webs 13'-13 which terminate at their lower endsinto a bearing bracket 14. This l bracket is hushed toorm 4a guide bearing for -an axial extension 15 of the valve operating rod .10. A secondand lower bearing' bracket 16 cast integral with the frame plates serves to join 'and space the frame y; plates and toprovide a guide bearing for the lower end of the valve'rod extension 15.

This Bearing bracket is hushed like bracket 14 and is spaced therefrom a distance along the valve ro'd extension substantially greater than the distance of the valve travel.

6 The valve rod extension 15 is diametrically slotted at 17 to receive a short cylindrical head 18 on one end of a levier 19 thus providing a sliding "pivotal connection between said lever and the valve rod extension 15. This connection `is maintainedbetween the periphery of the cylindrical head and the ends offthe slot 17 without binding and without back lash by abutments 2 O- .20

calipereld by an adjustment screw' 21 into proper driving connection withsaid cylinf drical head 18.

The connection between the lewver 19 and the valve rod lextension'l is duplicated at the vopposite end of said lever in the pivotal 20 sliding connectionfthere Iprovided between it and a sliding sleeve 22, the' latter beingslotted as shown `at 23 to receive a short cylindrical cylindrical lmtad'lS. The slot is provided 25 with abutmen s 25-25 which'are adjustably l calipered by a screw 26' it pro er driving connection with the cylindricalead 24.

Sliding sleeve 22 is guided and supported in two bearingsbrackets 27 and 28 which are 3 cast integral with the frame plates 1 2-12.

The upper or guide bearing bracket 27 car# ries the upper end of said sliding sleeve and is bushed similarto 'bearing bracket 14. The lower bearing bracket 28 serves to guide and lsupport the sliding sleeve 22 and a spline and spline way 29 locatedl therein serves to con fine said `sliding sleeve to sliding movement only. These bearings maintain the sliding 'sleeve parallel to and axially inthe same plane with the valve rod extension 15.

The slidin sleeve is axiallythreaded at its lower en to receive a square-threaded 'operating spindle 30, and is here shown 1n1 its lower most position with vsaid1 `sp'indle fully threaded into it. This spindle is enlarged at a point in its length to seat in a counterbore at the lower end of the'bearing bracket 28 forming a thrust bearing 31 therewith. .This bearing is backed-up and a bearing formed for a necked portion V32 of the spindle by a cover plate 33 which fits over the lower faced end ofthe bracket 28.

This cover plate is secured thereto by a 5 5 l* bolts appears in the head 24 which is a duplicate ofV l 1,5eo,1a1

manipulation. However when the valve is located in a low vposition the pinion is used, as shown, with a handwheel 37 located at any convenient position above, and connected with the pinion 'by a shaft 38 and a gear 'I0 39. Substantially midway between the sliding sleeve 22 and the valve rod extension 15 andv axially parallel and'co-planar with them is a cylindrical carrier 40 for Vthe lever 19. 75

This is freely slidable in a long bearing 41 which is integral with the frame plates 12--12 and securely webbed near its upper end between bearing brackets 14 and 27 and near its lower end between bearing brackets 30 16 and 28.

The lever carrier 40 and the bearing 41 are l both diametrically slotted as shown at 42 land 43 respectively for a length sufficient to 'allow the lever19 to (pivot at a point between 55 its ends on a bushe hub 44 about a short 'horizontal shaft 45. This lshaft is secured at its ends in the walls of the Slot 42 in said lever carrier. i The slot 43 in the 4bearing L 41 is substantially wider' than slot 42 and its 90 -length is such that atno time in the operationl of the valve will the lever strike its The lever carrier 40 is shown in its normal or raised position. Any tendency to move upward from. thisA position is prevented by shoulder 46 which is presented for engage ment with the lower faced end of bearing 41. The lever carrier is -at,theo same time prevented from movingdownward from its 1 normal position by one end 47 of a latch bar 48 which forms a supporting seat for it. The end 47 is circular and forked as shown in Fi 2 to pass freely on either side of a threaded pin 49 secured in thelower end of 10i the lever carrier 40 and in axial extension of it). VThis carries washers` 50-50 above and below the circularforked end 47 ofthe vlatch 4 bar 48to form a sliding pivotal connection e between said latch bar and the lever carrier.

This connection may be adjustedv to take up back-lash. or relieve friction by a nut and lock nutarrangement 51 threaded onto the lower end of the pin 49.

At a point substantially midway between its ends, the latch-bar 48 is provided. with a bushed hub 52 which gives it a pivot' bearing about a short horizontal shaft 53. This shaft is secured at its ends in bosses on the frame lates to which last-.it is perpendicular. nder the forceof the lever carrier 4U bearing downwardly u on the forked end 47. the latch bar 48 ten s to pivot clockwise about the pivot` shaft 53 but is preventedl r from so doing by a latch 54 which normally 12" -andireleasably engages and holds its oppc'v site head end 55.

' The latch 54 is of uniform thickness and is equall spaced from the frame plates. lt

is'provi ed with'a Head 56 land a foot 57. x30

At a point between' these it is keyed to a horizontal pivot shaft 58 which passes perpendicularly to the frame plates 12, 12'

von onefside, this shaft receives the hub of a horizontally extending hand trip and reset lever 59 alsokeyed to ,it and snugly held against the frame boss and prevented from sliding oft by a pinned washer 60. This is shown in detail in Fig. 2. Outside the frame members on the other side, this shaft is provided with an enlarged head 61 which fitssnugly against the frame boss and in 'conjunction with the hub of the lever 59, effec-- tively collars said shaft against sliding movement. This is also shown in Fi 2.

The head 56l of the latch 54 is notched as shown at A-B to receive the head end 55 of the latch bar 48. The notch A- B is so located that when engaged with said head end 55 an imaginary straight line drawn through the vertex of the notch and the axis of pivot shaft 5 8 will form an obtuse angle with a similarline drawn through'the vertex of the notch and thexaxis of pivot shaft 53. The side A of the notch A-B is curved, being generated by a radius swinging about the axis of pivot shaft 58. Side B is fiat and substantially vertical.

Freely pivoted on the shaft 58 to which thelatch 54 is keyed, is an L-shape'd trip -lever 62 comprising two spaced arms located on either side of said latch in close sliding fit between it and the frame .plates 12-12.

-It is pivoted at a point in its length sub stantially at the vertex of the L while at its upper end it is pivotally connected through a horizontalpivot stud 63 to one end of an emergency trip release rod 64.4 This last is in turn releasably held inthe normallyre-y tracted position shown, by engagement at its` opposite end with 'a manual or automatic emergency releasing device (not shown) such as the emergency governor mechanism of a prime mover. Whenreleased by such emergency device the release rod 64 tendsto move 1n the dlrection indicated by the arrow.

The horizontalportions ofthe spaced armsl of the L-shaped trip lever 62 are Joined by a horizontal bridge piece 65 integral Dwith and perpendicular to them and of' suiiicient width to lie partially beneath the foot 57I of the latch 54 and partially beneath abracket 66,

v which lastis' integral with and joins the frame plates 12, 12.

That part of the'bridge p iee 65 which passes beneath the foot 57 is planed to meet a similar planed surface on the under side of said foot and through Lthese planed surfaces,

shown' in contact at 67, movement between the trip vlever andthe latch may be transmitted.

Secured at one end in the bracket 66 1s a spring-supporting rod 68 which is sdspended Vthe latter. A lock nut arrangement 72 -threaded onto the lower end of the rod beneath thel lower collar providesV adjustment i for the spring compression. The upper collartransmits thespring action to the 'bridge piece 65 of the trip lever 62 through a knife edge bearing 73 integral with said bridge piece. about the opening 69 to meet the upper collar on its diameter line whereby the collar will slide freely on the rod 68 without bindinfr.

llhe operation of the particular embodiment of my invention shown in Fig. 1-v is as follows -the valve is shown in the full open position, having been raised to this position by the counter-clockwise rotation of the operating spindle A30 as viewed from the bevel pinion end.

Theknife edge bearing is divided `The operating spindle30 is lheld by .the

thrust bearing 31 to rotary motion" only while the sliding sleeve 22 is heldrby the spline andvsplineway 29 to sliding motion only. Thus the rotation of said spindleJ 9 yvard movement of the sliding sleeve 22 with its attached parts,l while irotation of the above named pinion or hand wheel will in no the opposite direction cause an upward movement of the ysliding sleeve 22 with its attached parts.

4T he vertical movement of the sliding sleeve 22 is transmitted to the cylindrical head 24 through the abut1nents'25-25 in the slot 23 and causes the lever `19 for which it forms one end, to pivot about its axis 45, in the lever carrier 40. The cylindrical head 18 at the opposite en d oli' the lever, operating vbetween the abutments 20-20 in the slot 17 in the valve rod extension '15 conveys to the valverod 16,. and -hence to the valve 7, the opening and closing movement originating in a' turn of the hand wheel 37. It-will thus be seenfthat a turn of said hand wheel counter-clockwise 'as viewed from above itA will tend to open the kvalve while a turn in the clockwise direction will tend to closev thel valve.` d

The operating spindle 30 and the sliding sleeve 22 are provided with. a threaded length sufficient yto fully open the valve be- `fore said sliding'sleeve strikes the guide so 'steep that the valve which is of the unbalanced type, as has been explained in the beginning, will tend to rotate the operating spindle and close itself in that manner.

The normal operation of the valve, that 1s, through the operating spindle, can be effected only .when the lever carrier 40' is in its upper or set position as shown. In.

. this position it receives thev downward.

thrust and weight of the valve 7 through the lever 19, which under this force tends to pivot about the -cylindrical hea'd 24.

The lever carrier is, however, maintained rigidly in. thisposition by theforked end 47 of latch har 48 which supports it from ueneath. This' tends to rotate. said latchbar clockwise, (as viewed'in the drawing), about the 'pivot shaft 53, but this is preventedby l'the hardened end 55 at its other end engaging in the notch A-B in the head 56 of latch 54.

The latch 541 is slightly biased angle of this engagement to rotate with the pivot shaft 58 counter-clockwise 'as viewed in the drawing such that it bears through its projecting fo'ot 57 firmly against thehorizontal bridge piece 65 through the faced abutting surfaces 67. It tends thus to move the trip leverl 62 counter-clockwise as viewed inthe drawing but it cannot do this without further compressing the trip actuating spring whichis already compressed to adegree sufficient to insure positive tripping ofthe mechanism 'under all conditions, when released. The-trip-rod 64 is releasably held by an emergency governor mechanism'not shown or by 'such other def vicel or mechamsm as may be provlded tolcontrol the tripping action of the valve, against the action -of the compressed trip actuating spring 70which bears upwardly against the horizontal bridge member 65 tending to rotate the trip-lever 62 clockwise,

as viewed in the drawing about lthe pivot shaft 58 and to thus bias the trip-rod 64 in the direction of the arrow.'

With the valve now in any open position as sh wn, `having been opened by a counter- -clockwise rotation' ofthe operating handwheel 37 it may be closed in any oneof three `waysgthus, (l) the clockwise rotab. l tion as viewed above ofY the operating handby the. -small unbalanced force resulting from the wheel, (2) by manually lifting the handle of the hand trip and reset lever 59 and (3) by the release of the trip rod 64 by the device which holds it.

The first method has been described and is the normal way. The second method is usedl when it is necessary to closethe valve more rapidly than it could be done, by the first method, as in an emergency condition. Lifting the handle ,of the hand trip and reset lever 59 in no Way disturbs the trip actuating spring 70, the trip-lever 62 or the trip-rod 64, as the hand trip and reset lever 459 and the latch 54 are both keyed to the shaft 58, while the tri -le'ver 62 is free upon.

the shaft 58. Thus t e'upward movement of the handle of the hand trip and reset lever 59 will carry the latch 54 clockwise with it causing the projecting foot `5'? to) leave contact at 67 with the horizontal bridge piece 65 and causing the notch A-B on the head 56 sliding on the surface A to leave the hardened. end 55 of the latch-bar 48.

When the end l55 and the notch A-B are fully disengaged the lever carrier is then unsupportedg since the latch-bar 48 is then free to pivot about shaft 53. The lever 19 is then held at but one end 24 and' the valve 7 is without support against the action tending to close it. Under this 'action it is now forced instantly to the closed position car- 40 to its lower or tripped position.

The cylindrical head l24acts in this case as a pivot for the lever 19. Any tendency rying downwardly with it the lever carrier of' the latch bar 48 tojicontinue in rotation 'about the pivot shaft 53 afterV the lever carrier comes to rest is prevented by the end 47 being held by a kwasher 50 below it.

The rapidity of the closing action -is controlledby the dash pot 8.`of the valve (but the cushioning effect there obtained may, in connection with simpler valves not .having this feature, be provided by embodylng a device of-that nature in the valve operatingv mechanism itself). y

' In the third method, the'relea'se of the trip rod 64 gives free action to the trip actuating sprin 7 0 which, acting beneath the horizonta bridge member 65 rotates it clockwise l as viewed in the drawingabout the axis of shaft 58. This clockwise rotation is transmitted to the latch 54 through the abutting surfaces gand the valve is tripped as before in th econd method.

v When the valve has been tripped closed, the mechanismmust be reset before the valve may be reopened. The operating spindle is turned clockwise as in manually closing the v-alve until the sliding sleeve 22 israised to the valve-closed position or upper limit of its travel, that is, until the lever 192 pivoting about cylindrical head 18 which 1s held, it will be seen, by the valve rod extension los 15, carries the Alever carrier 40 upward to 13 its normal position which is determined by the stop shoulder 46 closely approaching or meeting the lower end of the bearing 41.

This movement of the lever carrier 40 will have carriedthe forked end 47 of .latch bar 48 with it, that is, the latch bar, being slidably pivoted to the lever carrier by the calipering collar arrangement shown, will have been pivoted counter-clockwise (as viewed in the drawing), about the pivot shaft 53 toassume its original latched position. In pivoting t this position, its end 55 strikes and depresses vthe head 56 of the latch 54 until the notch A-B again engages with the end 55.

If the valve has been tripped normally the latch will have been automatically returned immediately to its original position to thus engage with the latchfbar, as the Weightof thehand trip and reset lever 59 tends to rotate the shaft 58 and hence the latch 54 counter-clockwise (as viewed in the drawing), untilv the projecting foot 57 on said latch is brdught to bear against the horizontal bridge piece 65 at the planed surfaces 67. All parts of 4the mechanism are now reset in position as if the' valve had been merely manually closed in the normal way, by means of the-,operating spindle.

` If the valve has been automatically tripped, that is,` by the release of the 'trip-rod' 64,

said trip-rodvmust be re-engaged with the -device by which it is releasably held. This is accomplished by carrying the handle of the hand trip and reset lever 59 downwardly, which in turn rotates the latch 54 counter-y clockwise (as `viewed in lthe drawing), and through the contact surfaces 67 rotates the trip lever K62 cotmter-clcckwiseL also. The.

horizontal bridge member 65 is carried downwardly, compressing the trip actuating spring 0,. and the trip-rod 64 is carriedin the rdirection opposite to that indicated by the arrow until it engages with: the particu` lar controllingde'vice employed in conjunc.- tion with the valve mechanism'. This brings the-notch A-B into position to receive the end ofthe latch bar 48 asdescribe'd above' 1n connection with manual'tripping,-

the resetting operationbein the same as before from this point. Shou d the order of operations in resetting the mechanism after automatic' tripping be reversed, such that the latclfbai` end 55 is presented for engagement withjthe notch A-B before the head s 56 of latch 54 is inv position to receive it no Referring-now to and 4:, a further y embodiment of myl invention is shown ap.

plied to the valve of Fig. 1. Similar names and the same numbers are used for like parts throughout the figures of the drawings eicept that in Figs. 3 and 4'the exponent a is added to distinguish such parts from those of Figs. 1 and 2. The valve-'hereshown has been described in connection with the last-named figures, and a furtherA descriptionl here isbelieved to be unnecessary.

The flanged stuiling box 11. is rigidl clamped to the valve casing 5a and suspen Y ed from and integral with .it are. two iat parallel frame plates 12, both of which are shown in part inFig. 4. These carry and j support the valve mechanism between them and are rigidly held in spaced'parallel relation to each other throughout by webs andv bearing brackets integral with and joining them after the manner of the frame plates of the previously described embodiment of my inyention.

Two such webs 13, 13 join the stuing i box ange-above, and at a distance below join a bearing bracket 14, This bearing is bushed to form a guide bearing for a cylindrical valve rod extension 15a. The valve rod extension 15a is diametrically slotted as shown at 17a at its lower end to receive an elongated head 18a on one endof a lever 19, A `sliding pivotal connection between said lever and the valve rod extension 15L is A* maintained through .operating contact between a short roller 74 carried bythe extension 15 and mounted in the slot 17, and an elongated o e 75 in the head 1 8 through which tlh 74 is shouldered at both ends and mounted on a short 'shaft7 6 secured at its end in the .'walls of ther slot. The axisl of the shaft cuts e ro ler. passes. The roller 'los the axis of the valve `rod extension 15'* .at

right angles and is located a distance from the top of the slot suIic-ient to give the head l 18a free movement between it and the roller',

such that all movements between the valve rod extension 15a and the lever 19* will bel .transmitted througlh the contact between the. roller 74 and t e sides of the elongated opening 75. The width of the elon tedopening 75 is slightly -eater than the iameter of the roller and its length is such that the roller in operation will not fully reach either end of it.

At substantially midway between its ends the lever 19, of comparatively thin, rectangular section, passes diametrically through a slot 23a provided for it in a `sliding sleeve l 22a. It is therein pivoted on and carried by a short horizontal shaft 77 which is-in turn secured at its' ends in land -perpendicular to the walls of said slot. .Thus the lever 19L is carried by the sliding sleeve.l 4The length of the slot 23a is such that the lever '19n ma pivot about the shaft 77 throughout the ulyl operating movement of the valve without striking the ends of said slot.

The sliding sleeve 22 isguided and supported in two bearing brackets 27 and 28 J which are cast integral with the frame plates 12, 12. The upper bearing 27 carries and guides the upper reduced end of thesliding sleeve 22, which last is-of sufcient 'length to insure ythe full upward valve opening movement of the sliding sleeve,before a shoulder 78 provided thereon as a stop meets the lower faced end of bearing bracket 27, Bearing bracket 27\ is bushed similar to bearing bracket 14 to which it is also webbed. The lower bearing bracket 28 serves as a guide and support for the sliding sleeve 22 and a spline and spline-way 29 located therein serves to confine said sliding sleeve to sliding movement only. These bearingsmaintain the sliding sleeve 22 parallel to and axially in the same plane with the valve rod extension 15 and are widely separated to insure smooth operation of the sliding sleeve.

Thel lower end of the sliding sleeve is 'axially threaded to receive a square threaded operating spindle 30 and is here shown in its lowermost position with the operating 'spindle fully threaded into it. The operating spindle yis enlarged at a point in Aits length to seat between two annular bearings 7 9-79l formingltherewith a thrust bearing 31 in a counterbore at the lower end of the bearing bracket 28. l

'A flanged cover late 33 is fitted over the faced lower end of) bearing bracket 28 and is secured thereto by a series of threaded pins 34, one of which appears in the section of the gure. TheV cover plate extendsv within the counterbore to hold the bearing rings 79-79 in position. It forms a guide bearing also for a neckedportion 32' of the operating s indle which extends down-l wardly through it to receive an operating handwheel 37, This is secured tothe opere ating spindle after the manner of the beveled operating pinion 35 in Fi 1, and it is obvious that such a pinion mig t, if desired,

be used here in lace of the handwheel 37. p vThe end of t e lever 19, opposite that carrying the elongated head 18 is upturned and rounded to form a toe 8O which vis maintained in sliding pivotal connection witlr a latch bar 48.

This last, in the form lof two flat, spaced,

1 parallel arms, carries integral with it between adjacent end'sof said arms, a horizontal abutment member 81. This normally prevents upward movement -of the toe ,80 which bears beneath it. The arms are ex-A 'tended downwardly on. either side of the toe 80 and forward to form retracting hooks 82 which lie beneath the ends ofthe abutf ment member 81 in spaced parallel relationk thereto. A- retracting pin 83 is passed through and secured in the toe to lie parallelv4 to the abutment member with its ends lying midway and with' slight clearance between the retracting hooks and the endsof said abutment member. 4

The latch bar is carried at its'op osite end on two short, oppositely dispose coaxial pivot studs 53 projecting into it from the frame plates 1212. The axis of these studs is located substantially aboveand parallel to that ofthe pivot shaft 77. The plan (f this arrangement is further shown in ig. 4. A L

A latch 54 is mounted on and keyed to a horizontal pivot shaft 58 to swing into substantially a vertical position and into engagement with a notch A'B in the abutp ment member 81. For thepurpose of thus engaging with this abutment member the up er end of the latch 54 is widened'to form a ead 56 substantially the width ofthe abutment member with which it engages. The surfaces engaging at A are generated by a radius swinging about the, axis of the vpivot shaft 58, while the surfaces engaging at B are generated by a'radiusswinging about the axis of the studs 53..

The pivot shaft 58, to which the latch 54 is keyed, projects through oppositel disposed bosses on the frame plates whic pro` vide pivot bearings for it, and is prevented from axial sliding by pinned Awashers washer at the rear, as viewed in the drawallel arms located between the frame p ates and either side of the latch 54. The two' arms of this trip lever are joined at their which is integral' with them. The bridge piece 65 passes beneath a foot projection 57 on the latch 54, Abutting planed surfaces on each`arev adapted to meet at 67 and to` 'inner endsby a horizontal bridge piece 65 transmit driving movement between the trip lever 62 and the latch 54.

Beneath the bridge piece 65 a downwardly rojecting knife edge bearin 73 integral wit it meetsV a diametrical epression in the top of a splrin cap 84. This in turn receives the upwar thrust of a com ressed helical trip actuatin seated at its lower env in a spring supporting guide cup 85. The cup 85 isreduc/ed in diameter at its lower end to fit lslidably into a socket 86 rovide'd for it in a sup. porting bracket 87) webbed to the lower end of bearing bracket 28. A-ke 88 `sldably fitted into a keyway loca the stud 63n while the otherend of said trip y mechanism of a prime mover.

opening the valve. Should theluid sure fail and the valve be thereafter c osedrod is releasably held by a manual or automatic emergency releasing device (not shown) such as the emergency governorl When released trip rod 64n tends to move in thedirection of the arrow under action of the trip actuating spring a.

tThe operation of theparticular embodiment of my invention shown inFig. 3 here follows: The valve is. shown in the closed position and may be opened only by turning,

the handwheel 37tL counter-clockwise Aas viewed from above it. This causes the operating spindle 30a to tend to unthread out of the sliding sleeve 22a. However the thrust bearing 31 prevents this and since the sliding sleeve 22a may slide axiall the latter moves upward/ ofi'. the operating spindle. This movement carries pivot axis 77a of the lever 19a upward, but the whole lever cannot follow this movement as the rounded toe end 80 bears upwardly against the locked and immovable abutment member'Sl of the latch bar 48?. Hence the lever pivots about the lpoint of contact of the toe 80 with the abutment member v81 and the opposite end 18a moves upward bearing against the roller 74 throu h the lower side of the elongated slot 75. This carries the .valve rod extension 15a upward; together with the valve operating rod 10", and thereby moves the valve 7*.upward and o en, the degree of opening be1ng determine by the amount the hand' In" closing vthe valve manuall by the handwheel 37 the operating spin le merely assists the forceitending toclose the vvalve so that the toe 80 of the lever 19* will be held in contact with theabutment member 81) and the roller 74 will bear against the lower side of the slot 75 the same as when resthe weight ofthe valve would prove suf- .icient to supply the closing forcel under this condition which would not be an emer-` gency condition.

In 'both the opening and closing actions under manual operation, the fulcrum point y of the' lever is at the toe 80 the moving force is at. ivot 7 7r and the weight-at the roller 74,' t e difference "between the two lever 19u is thus moved downward carryactions being thatinI opening the valve the moving force acts upwardly'or actively at 77, while in closin the valve it acts `downwardly or passive y thereat.

With the valve in any open position 'the 70 Yviewed inthe drawing thereby moving latch 54a which is keyed to said shaft.4` Since trip lever 62 is loose on shaft 58a it will not be moved. The surfaces at the notch. A- a will disengage. as the latch 54'thus 85 turns counter-clockwise, with the vresult that the toe ofthe lever 19a will be free to `fly upwardly, pivoting about shaft 77 under the closing force acting downwardlyl on thevalve 7 af and transmitted.. to the roller 90 74. The valve 7EL thus unsupported' will be forced instantly to the closed position by the unbalanced' fluid pressure above it. The `latch bar 48a will pivot about the e,

studs 53HL as the abutment member 81 is car 95' .i

fied upward by the toe 80 of the' lever 19.`y

-When the'releasedvalve dropping rapidly to the closed position, suddenly seats,y the lever 19a and the toe 80 Wi l stop comparatively suddenly and any ltendency vof the 10..

. tween the trip lever bridge member 65a and the latch heel 57 are separated by this manual trippingmovement instead of acting 1 10 vone against the 'other as in the automatic tripping movement hereinafter described.

After manually tripping the valve closed from any-'open position; the weight of the hand tri 'and reset lever 59a tends to return 115 the latc to its original position rotating clockwise as viewed in the drawing until the latch heel 57a meets the top of the bridge piece 653 at theabutting'surfaces 67, In this'position the latch isready to reenfgagev l 'with 4the abutment memberf81 of the latch bar 48% which is moved down into normal l position by operating the handwheel '37? as if normally closing the valve. I The va ve being already closed, the lever 19a will ivot 125 e 22'* is moved downward.' The ktoe 80 of the ing the abutment member 8l `of/latch bar 48 with it through retracting pin 83 whichy engages with the retracting hooks 82. This brings the abutment member 8l and notch AB a into normal position and the resetting operation in this case is completed when the latch head 56a, slightly displaced to the left by the descending abutment member B1 snaps into engagement with the notch Aa-B In case the emergency tripping mechanism is actuated by the automatic controlling device, such as the emergency governor of an elastic iiuid turbine, the release of the trip rod 64 allows the trip lever.62a to pivot about shaft 58a counter-clockwise, as viewed in the drawing,l under the expanding upward action of the trip actuating spring 70a acting beneath the bridge piece 65a.

v This bridge piece 65a, bearing through the abutting Jsuriaces 67a against the latch heel 57 aon the latch 54a, carries the latch counter-clockwise also, which releases the mechanism in the same manner as if the handle of the hand trip and reset lever 59a had been raised manually. In fact, this lever, being keyed to the 54a.' 4 l To reset the mechanism after automatic tripping, thehandle of the hand' trip and resetA lever 59at is moved' downward, which action rotates the latch` 54clockwise, the. latch heel 57a Vbearing, downwardly on -ithe bridge piece ,65a at the abutting surfaces 67a.

shaft 58a moves with the latch lThis compresses the trip spring 70 and rotates the trip lever 62BL clockwise as viewed 'n the drawing until the trip release rod 64a, moved in the direction opposite to that indicated by the arrow, latches into position in the emergency or holding device em- Yployed with it.

The remainder Lof the resetting operation is as described above as after manual tripping..

In any case when vthevalvel has been tripped closed, the mechanism must be reset before it may be reopened; that is, the toe of the lever 192L must be held` against upward movement by the abutment member 81 of \the latch bar 48,l This abutment member in turn must engage or be made to engagewi'th the head at-the notchAL-Ba.y

Should the sliding -sleeve 22L be brought tothe valve-closed'position before the latch lis reset into position. to engage the descending abut ent member 81 after automatic tripping, t ere will be no ditlic'ultyin engaging the latch head 56Et with the notch Aaa -as. said latch head, pivoting into position under the downwardv movement of the hand trip and reset-,leverQa' as before described` will engage with said notch 'Aa-Ba along the surface A which, being generated by la radius swinging about the axis of shaft 58a as hereinbefore described, will offer no resistancel to this engaging action.

l sliding sleeve.

56a of the latch 54a.

.able operating lever havin 19il is full Hoa-ting and entirely movable. 'F

The f ulcrum pointof the lever is also not fixed but is located temporarily in' each of the pivot axes of the lever in sequence as `the various operations of the valve mechanism require. This is a desirable feature in that it does away with the objectionable toggle linkages4 common to former constructions and the operating handwheel does not drop or slide on tripping the valve, the closing action of the valve being transmitted to theliioating lever only.`

In" accordance 4with t-he provisions of the patent statutes, I have described the principleof operation of my invention, together with the apparatus'which I now consider tol represent the best embodiment thereof, but I desire to have it understood that the lapparatus shown is only illustrative and that.

the invention may bevcarried out by other means.

lVhat I claim as new and desire to secure by Letters Patent of the United States, is:

l. The combination with a throttle valve of 4the self-closing reciprocating type, of a lever pivotally connected therewith, a releasable support for the lever, a sliding sleeve pivotally connected with the lever, and a screw threaded spindle for moving the 2. The combination with a self-closing throttle valve, of an operating rod connected therewith, a lever pivotally connected with said operating rod, a latch releasable means pivotally supporting the lever, a sliding sleeve pivotally connectedl with the lever, a screw threaded operating 'spindle upon which the sliding sleeve is adapted to move, and means for rotating the operating spindle to move the sliding sleeve.

, 3. In a comb-ined throttle and emergency valve mechanism, the combination of a'movable operating lever, a valve operating rod 'moving the latch out of such engagement comprising a hand lever and an emergency releasable means operatively connected with the'latch, an actuating member for the mov- 11o rpivotally connected therewith, a supporting able operating lever pivotally connected with it, a non-slidable operating spindle onto` which the actuatingl member is threaded, and means for rotating thel operating spindle. v

4. In a combined throttle'and 'emergency valve mechanism, the\ combination of a movthree axially parallel pivot axes located a ong its length, a sliding rod connectedat one of saidpivot axes, said rod being adapted to move .a

valve, a releasable supporting means for the -nting the valve, a threaded spindle oper` atively connected therewith, a thrust bearing for the spindle, and a sliding sleeve for the spindle threaded to move thereon andy connected with the lever through theremaining pivot axis.o

5. The combination with a valve casing,

a valve therein and an operating rod for' the valve, of a frame fixed to the valve cas-4 ing and provided with a guide for the operl atin rod, a second guide in the frame, a mem r which slides therein, a lever pivotally connected to saidk rod and to said member, a fulcrnmfor the lever carried by said frame, manually operated means for sliding the said member in its guide to turn the lever on its fulcrum for opening Aand closing the valve, a releasable support for said fulerum, and means for releasing it to per- Amit the valve to close independently of said manually operated means.

' In witness whereof, I havehereunto set my hand thislth day of February, 1923.

CHARLES E. SPINNLER. 

